Overview

This design uses an ISL85403 synchronous buck or boost-buck controller in the buck-boost configuration to extract power from a supercapacitor (as low as 0.1V).

Buck-Boost Last Gasp Power Supply for Energy Meters Reference Design Board
Buck-Boost Last Gasp Power Supply for Energy Meters Reference Design Board
  • The ISL85403 controller can fully extract the power of the supercapacitor
  • Buck-boost with electrical double-layer capacitor (EDLC) backup with one ISL85403
  • Quiescent current is only 300µA
  • Reliable solution for battery and EDLC-based never-stop systems

Design & Development

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Buck-Boost Last Gasp Power Supply for Energy Meter

This design uses an ISL85403 synchronous buck or boost-buck controller in the buck-boost configuration to extract power from a supercapacitor (as low as 0.1V).